diff --git a/src/GRANULAR/fix_pour.cpp b/src/GRANULAR/fix_pour.cpp
index 2ae86cd428..a6284d1d5e 100644
--- a/src/GRANULAR/fix_pour.cpp
+++ b/src/GRANULAR/fix_pour.cpp
@@ -483,6 +483,7 @@ void FixPour::pre_exchange()
       xyz_random(h,coord);
 
       if (mode == ATOM) {
+        natom = 1;
         coords[0][0] = coord[0];
         coords[0][1] = coord[1];
         coords[0][2] = coord[2];
diff --git a/src/MISC/fix_deposit.cpp b/src/MISC/fix_deposit.cpp
index f7e4900880..a804028397 100644
--- a/src/MISC/fix_deposit.cpp
+++ b/src/MISC/fix_deposit.cpp
@@ -355,6 +355,7 @@ void FixDeposit::pre_exchange()
     // also modify image flags due to PBC
 
     if (mode == ATOM) {
+      natom = 1;
       coords[0][0] = coord[0];
       coords[0][1] = coord[1];
       coords[0][2] = coord[2];